Associates of New Jersey Gov. Chris Christie have been subpoenaed for a second investigation involving a New York bridge, the New York Times reports, even as federal investigators continue to investigate the Christie administration for politically motivated lane closings at the George Washington Bridge.

The bridge at the center of the second investigation is the Pulaski Skyway, an aging four-lane causeway connecting New Jersey to Manhattan that the Christie administration had lobbied the Port Authority for $1.8 billion worth of road repairs. Port Authority lawyers objected to the request, warning that the bridge was property of the state of New Jersey and therefore could not legally be funded by the Authority.

Eventually the two sides reached an agreement that re-characterized the bridge as an access road to the Lincoln Tunnel, which more than 40 blocks north of the Skyway. Bonds issued for the repairs described the project as “Lincoln Tunnel Access Infrastructure Improvements,” the New York Times reports. If that statement is found to be inaccurate, it could run afoul of state and federal securities laws, and prompt felony charges to be brought against its authors.

Deborah Gramiccioni, the Port Authority’s deputy executive director and a Christie appointee, told the Times the plan to fund the bridge had been “thoroughly vetted” by the New Jersey attorney general lawyers. Christie has previously made similar statements about the funding of the road repairs. “Dozens and dozens of lawyers from both sides of the river reviewed that financing plan and approved it,” he said in April, “as did the commissioners of the Port Authority.”

The investigation was spun off of a prior investigation into the administration’s alleged involvement in lane closures at the George Washington Bridge in Sept. 2013 as retaliation against local political opponents.